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Agronomy
WATSON, K . A . , and P.R. GOLDSWORTHY. 1964.
S o i l f e r t i l i t y i n v e s t i g a t i o n s i n t h e
m i d d l e b e l t o f N i g e r i a . Emp. J . Exp.
A g r i c . 3 2 ( 1 2 8 ) : 2 9 0 - 3 0 2 . 223
Experiments w i t h d i f f e r e n t types and l e n g ­
t h s of f a l l o w have shown t h a t where o n l y a
s h o r t f a l l o w can be a l l o w e d , Cajanus cajan
or Andropogon gayanus as p l a n t e d covers
were more e f f i c i e n t than n a t u r a l regener
a t i o n . There i s evidence t h a t f e r t i l i z e r s
are as e f f e c t i v e as manure in m a i n t a i n i n g
f e r t i l i t y under continuous c r o p p i n g .
WATT, SIR GEORGE. 1889.
Cajanus cajan. D i c t i o n a r y of t h e Economic
Products o f I n d i a , p p . 12-15. C a l c u t t a :
Supdt. Govt. P r i n t i n g . 224
WATT, SIR GEORGE. 1908.
The commercial p r o d u c t s of I n d i a - An
abridgment o f , " D i c t i o n a r y o f t h e Economic
Products of I n d i a . " London: John
Murray. 1189 pp. 225
Pigeonpea is known in I n d i a as Cadjan,
t u v a r ( T u v e r ) , t u r , t h o r , a r a r ( u r o r ) ,
r a h a r d h a l , l a h a r , o r o h a , gelamah, t o g a r l ,
k a n a l u , and p e h - y e n - k l y u n g . Watt a l s o
notes t h a t C. i n d i c u s bicolor is r e f e r r e d
to as the Congo or Angola pea, and
C. i n d i c u s flavus, as t h e no-eyepea in
t h e West I n d i e s . The p l a n t was probably
i n t r o d u c e d by s l a v e t r a d e r s i n t o the West
I n d i e s and N o r t h America from A f r i c a .
In n o r t h e r n Bengal and Assam the a r h a r
is s p e c i a l l y grown as a food p l a n t f o r
the l a c i n s e c t . S i l k was produced i n
Madagascar by s i l k w o r m f e d on t h e
pigeonpea.
WHYTE, R.O., G. NILSSON-LEISSNER, and
H.C. TRUMBLE. 1953.
Legumes in A g r i c u l t u r e . Rome: FAO. 2 1 :
367 pp. 226
The s c i e n t i f i c and p r a c t i c a l i n f o r m a t i o n
at p r e s e n t a v a i l a b l e on members of l e g u m i -
nosae is s u r v e y e d . Problems of agronomists
and o t h e r s engaged in r e s e a r c h are reviewed.
P a r t I c o n t a i n s t h i r t e e n c h a p t e r s d e a l i n g
w i t h economic botany o f legumes, e c o l o g i c a l
and b i o t i c r e l a t i o n s h i p , legumes i n t r o p i c s
and s u b t r o p l c s , e t c . The c e n t e r s o f o r i g i n
of t h e c h i e f leguminous genera and species
are d e f i n e d a c c o r d i n g t o V a v i l o v ' s propos
a l s . P a r t I I p r o v i d e s i n f o r m a t i o n o n t h e
c h i e f c h a r a c t e r s and uses o f t h e d i f f e r e n t
genera and s p e c i e s , and f o r i m p o r t a n t
c r o p s , a l s o on types and v a r i e t i e s . The
survey concludes w i t h t a b u l a t e d i n f o r m a t i o n
o n p l a n t c h a r a c t e r s , c l i m a t i c and s o i l
a d a p t a t i o n , number of seeds per pound,
s e e d l i n g r a t e s , and s u i t a b l e s p a c i n g s .
WILLIAMS, S . J . A . , and J . A . SPENCE. 1 9 7 1 .
Dwarf pigeonpeas as a row c r o p . C a r i b b .
Fmr 3(1) : 1 9 . 227
I n T r i n i d a d , p r e l i m i n a r y r e s u l t s o f f i e l d
t r i a l s w i t h dwarf pigeonpea (Cajanus s p p . )
showed t h a t t h e e a r l y f l o w e r i n g and the
dwarf h a b i t of the p l a n t s a l l o w e d dense
p l a n t i n g and m e c h a n i z a t i o n . A d e n s i t y of
165,000 p l a n t s / h a in rows and mechanical
h a r v e s t i n g y i e l d e d 2,500 kg/ha a f t e r a
c r o p p i n g p e r i o d of 111 days as compared
w i t h 4,500 kg/ha and a c r o p p i n g p e r i o d of
210 days f o r c o n v e n t i o n a l methods of
c u l t i v a t i o n . Mechanical h a r v e s t i n g c o s t
was 20% of t h e cost of t r a d i t i o n a l manual
p i c k i n g .
WILSIE, C.P. 1935.
Seed p r o d u c t i o n s t u d i e s w i t h legumes i n
H a w a i i . J. Am. Soc. A g r o n . 27:
784-790. 228
This study of the response of C. cajan
t o spacing observes t h a t each p l a n t t r i e s
t o f i l l t h e a v a i l a b l e space s u r r o u n d i n g
i t , the r a t e o f f i l l i n g f o r a g i v e n c u l t i -
v a r depending on the sowing d e n s i t y . But
the l i m i t a t i o n s imposed by spacing have
n o t been e s t a b l i s h e d . The p l a n t - s p a c e
r e l a t i o n s h i p i s the p o t e n t i a l a b i l i t y o f
a g i v e n c u l t i v a r t o e x p l o i t the e n v i r o n ­
ment. Spacing more w i d e l y than 1.52 x
2.29 m r e s u l t e d in a p r o g r e s s i v e d e c l i n e
in y i e l d , which was lowest at a spacing
o f 3.05 x 3.05 m,
YADAHALLI, Y . H . 1973.
I n t e r c r o p p i n g of redgram w i t h maize and
r a g i i s p r o f i t a b l e . C u r r . Res.
2(6) : 3 7 . 229
I n t e r c r o p p i n g red gram w i t h maize, r a g i
(Eleusine c o r a c a n a ) , g r o u n d n u t , and s o y ­
bean gave t o t a l y i e l d s (seed, g r a i n ,
u n s h e l l e d n u t s ) of 1.86, 1.19, 1.13, and
1.11 t / h a , r e s p e c t i v e l y , compared w i t h
0.57 t / h a f o r pure stands of r e d gram.
YADAHALLI, Y . H . , G. JAYARAM, and
G. SHIVASHANKAR. 1976.
Redgram v a r i e t y Hyd-3C w i t h h i g h e r p l a n t
p o p u l a t i o n y i e l d s more than double t h a t o f
v a r i e t y C o - 1 . C u r r . Res. 5 ( 3 ) :
133-134. 230
I n c r e a s i n g t h e d e n s i t y from 50,000 t o
75,000 p l a n t s / h a i n c r e a s e d seed y i e l d s
from 1.88 to 2.08 t / h a in the new Cajanus
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