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Table 72. Grain yields and rupee values of several farming systems on medium deep Vertisols at ICRISAT<br />
Center, 1976-1977.<br />
Intercropping a<br />
Sequential cropping a<br />
Ws Planting Tech.<br />
No. method used Slope Maize<br />
Gross<br />
value<br />
Maize<br />
Pigeonpea<br />
Chickpea<br />
Gross<br />
value<br />
A. Double-crop systems<br />
B W 7 D Bed Impr<br />
BW7B Bed Impr<br />
BW7C Bed Impr<br />
Mean<br />
(%) (kg/ha) (kg/ha) (Rs/ha) (kg/ha) (kg/ha) (Rs/ha)<br />
1.0 2170 390 2940 2210 130 2270<br />
0.6 2060 620 3470 2460 410 3250<br />
0.6 2740 730 4350 2150 500 3220<br />
2400 675 3910 2305 455 3235<br />
BVV6C Flat Impr Contour 2470 410 3260 1850 390 2660<br />
B W 6 D Flat Impr Contour 2040 690 3640 1760 310 2 370<br />
Mean<br />
2255 550 3450 1810 350 2520<br />
B. Sorghum/pigeonpea intercropping and sole sorghum a<br />
Sorghum<br />
Pigeonpea<br />
Gross<br />
value<br />
(kg/ha)<br />
(kg/ha)<br />
(Rs/ha)<br />
BW8A Flat Trad<br />
BW8A Flat Trad<br />
640<br />
630<br />
440<br />
-<br />
2210<br />
1010<br />
a Varieties used: Improved - Maize intercrop, SB-23; Pigeonpea, ICP-1; Sole maize, Deccan Hybrid; Chickpea, local; Sorghum,<br />
CSH-6. Traditional -local.<br />
were substantially less than on the deep Vertisols.<br />
This is believed to be due to greater moisture<br />
stress during the severe September drought and<br />
inadequate moisture for the postrainy season<br />
crops. Yields and benefits from bedded cultivation<br />
on both deep and medium deep Vertisols<br />
are likely to improve since the beds are left in<br />
place and soil structure in the broad beds is<br />
expected to improve due to reduced soil<br />
compaction.<br />
The sorghum yield from rainy season cropping<br />
on BW8 A (traditional technology) was 630 kg<br />
ha (Table 72 B). It is interesting to note that<br />
sorghum and the addition of the pigeonpea<br />
intercrop more than doubled the gross monetary<br />
value. This was true even in a season when the<br />
rainy season rains stopped one month earlier<br />
than normal, which caused some moisture stress<br />
for the late-maturing pigeonpea.<br />
Crop Production on Alfisols<br />
Grain yields and monetary values for the three<br />
cropping systems used on the Alfisols (RW1 and<br />
2) are given in Table 73. RW1 E, which was<br />
contour bunded and flat planted along the<br />
contour, consistently produced the lowest yield<br />
of the three cropping systems. The reduced yields<br />
appeared to be due to erosion and sedimentation<br />
between the bunds, which caused reduced plant<br />
192
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