. , . , . .

, , MD 20742
rh30@umail.umd.edu

1998

.
,
. ,
, ,
,
(-. PSI),

. , ,
, ,
, , , .

.

1998 ,
, Microsoft
Windows.
1998 , 1999 ,
.
, ,

( - . PSI) .
,
Windows,
.
(. College of Agriculture & Natural Resources)
, .

,

, (-
a. PSI)
.
. :

1

---

(1).
Windows ,
Windows 95, 98, NT, 2000.
(2).

(Microsoft Visual C++).
(3).

, ()
.
(4).
, ,
,
.
(5).
,
,
.
(6).
« » ,

, , .
,
.

,
, , a
,
. NRCS
, ,

. 2000
,, " (a. Phosphorus Index Properties for
Soil - PIPS).
(a. USDA-NRCS National Soils Information System - NASIS)
23 .
Windows .

,
(a. the Maryland Phosphorus Site Index - PSI), 2001,

. Windows
, ,
. ,
. PSI ,
,
(a. Phosphorus Site Index Properties for Soils - PIPS). PSI

,
, .


2

---

/
( ). ,
, , (), a
A .
. ,
- , - , -
, a ­ .
/ ,

.
( ), , ,
999 . ,
Windows .
(a. PSI)
, .
, ,
,
30 ,
(a. PSI).

,
(ang. NuMan MD) 2001.
NuMan MD 32- Windows
,
DOS FERTREC, .

. ,
,
, ,
, ,
, / .
, ,
, /
,
,
.
.
200 (/ )
28 . ,
, /
. ,
, .
999 . NuMan MD
FERTEC ,

3

---

FORTEC,
.


,
.
Windows
, .

( - a. PSI), ,

,
(a. Maryland Nutrient Management for Professionals -
NuMan MD Pro). , NuMan MD Pro beta
2003 , a 2003 .



,
,
1998 .

,
.


4

---