TY  - BK
AU  - Hipp,B.W.
AU  - Simpson,B.J.
TI  - 35 years of farming systems research in the Texas Blackland
SN  - 0096-6061
U1  - 89-055082 
PY  - 1988///
KW  - Crop yield
KW  - AGROVOC
KW  - Fertilizer application
KW  - Gossypium
KW  - Sorghum
KW  - Texas
KW  - Triticum
KW  - Rotational -
KW  - Término tomado de AGROVOC
KW  - Zea mays
N1  - ill. ref. Includes statistical data
T2  - B - Texas Agricultural Experiment Station (USA). no. 1604 Jul 1988. 28 p
ER  -