Pm. Nimje, EFFECT OF SPATIAL ARRANGEMENT AND PHOSPORUS FERTILIZATION IN PIGEONPEA (CAJANUS CAJAN)-SOYBEAN (GLYCINE-MAX) INTERCROPPING SYSTEM, Indian Journal of Agronomy, 40(3), 1995, pp. 380-385
A 2-year experiment was conducted on a clayey deep Vertisols of Bhopal
to study tile effect of row ratios and phosphorus fertilization on pi
geonpea [Cajanus cajan (L.) Millsp.]-soybean [Glycine max (L.) (Men.)]
intercropping system. At 120 cm row spacing higher, number of branche
s, grains/pod and yield were recorded in sole cropping compared with i
ntercropping systems. Among intercropping, 1 : 3 ratio gave significan
tly higher number of branches, pods, grains/pod, 1,000-grain weight an
d grain yield than 1 : 1 ratio, and pigeonpea-yield equivalent increas
ed by 31.6 and 35.3% over 1 : 1 ratio and sole pigeonpea at 60 cm row
spacing respectively. The highest land-equivalent ratio (1.39), moneta
ry yield advantage (Rs 6,712/ha/a) and benefit : cost ratio of 2.8 wer
e recorded at 1 : 3 row ratio, followed by 1 : 2 row ratio (27.5% high
er pigeonpea-grain-yield equivalent over sole pigeonpea at 60 cm row s
pacing). Consumptive water use and water-use efficiency also increased
with intercropping at higher row ratios of 1 : 2 and 1 : 3. Increase
in the dose of 30 kg to 90 kg P2O5/ha resulted in increase of grain yi
eld of both pigeonpea and soybean. The pigeonpea-grain-yield equivalen
t was increased by 28.2%, the water-use efficiency by 7.7 kg/ha-cm, ne
t profit by Rs 5,733/ha and benefit: cost ratio by 3.45.